PRESSURE-DEPENDENCE OF THE ELECTRONIC-PROPERTIES OF CUBIC III-V IN COMPOUNDS

Electronic and ground-state properties of the binary In compounds in the zinc-blende structure are reported. They are evaluated in the local-density approximation using norm-conserving nonlocal pseudopotentials. Besides the lattice constant, the bulk modulus, and its first and second pressure derivative, the first- and second-order pressure coefficients of the main band gaps (at , X, and L) are given. The hydrostatic deformation potentials and the crossover pressure from direct to indirect band gap are presented and compared with recent experimental values. © 1990 The American Physical Society.